Counter Function; Overview Of Counter Function - Panasonic FP7 User Manual

7.1 Counter Function

7.1 Counter Function

7.1.1 Overview of Counter Function

● The count function is used to count the number of input pulses and reflect it to the elapsed
value. The freqeuncies of input pulses can also be measured.
● When an external output is necessary, use this function in combination with the comparison
function.
● There is also a function which holds the elapsed value at the time of the trigger input signal
from an external device. For details, refer to
■
Outline of specifications
Item
Counter type
Number of channels
Counting range
Max. counting
(Note 1)(Note 2)
speed
Count method
Optional functions
(Note 1) By default, the input time constant is set to 2 µs. Change the setting according to the frequencies
required. (The count upper limit at 2 µs is approx. 100 kHz.)
7-2
Specifications
Linear counter/Ring counter
Max. 4 channels
-2147483648 to +2147483647
When input voltage is 5 V: 500 Hz (For phase input: 500 kHz)
When input voltage is 12V: 500 kHz (For phase input: 350kHz)
When input voltage is 24V: 250 kHz (For phase input: 180kHz)
Direction distinction input, Individual input, Phase input (1 multiple, 2 multiple, 4 multiple)
Comparison output setting: Max. 8 points
Elapsed Value Offset/Preset Function
Elapsed Value Hold Function
Count upper and lower limit settings
Overflow/underflow detection (Linear counter only)
Input pulse frequency measurement
""7.4 Elapsed Value Hold Function"".
WUME-FP7MXY-06